SPRINGBACK VARIATION CAUSE ANALYSIS METHOD

摘要

A springback variation cause analysis method includes: calculating a first stress distribution in a press forming part; calculating a second stress distribution in the press forming part; calculating a difference between the second and the first stress distribution, and replacing and setting the first or the second stress distribution with the calculated stress difference distribution; calculating a first springback amount to be caused in the press forming part; changing a value of stress difference in a partial area of the press forming part in the stress difference distribution set for the press forming part; calculating a second springback amount; and analyzing a portion in the press forming part that is a cause of variation in springback amount in the press forming part due to scattering or variation in press forming conditions, based on the second springback amount and the first springback amount.